Every time I close sketchup, and then reopen it, it doesn't work anymore, until I completely uninstall it, and reinstall it, this is getting to be a pain. The symptoms are, When it opens, I just get a white screen with the toolbars, and the pencil, but the pencil doesn't draw anything no matter what I do, then when I go to exit it asks if I want to save changes, but I didn't make any changes. This has happened about 6 times so far, and, seven is the charm, or the end. Thanks for any help in advance, I really like this program, and would hate to see it deleted.